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A high temperature heat pump using water vapor as working fluid.

Bomba de calor de alta temperatura usando vapor de agua como refrigerante.

Author(s) : LARMINAT P. de, ARNOU D., LE SAUSSE P., et al.

Type of article: Article

Summary

High temperature heat pumps are available for temperatures up to about 100°C, using ammonia or synthetic fluids. Beyond 100°C, very few products are available on the market. Previous theoretical studies have shown that water vapor is a very attractive fluid beyond 100°C. But the implementation was so far stumbling on complex technological issues. These difficulties have been tackled. A prototype was built and tested. It uses a two-stage centrifugal compressor directly driven by a high speed motor on magnetic bearings. It is designed for 700 kW heating capacity at 90°C evaporation and 130°C condensation. It was successfully tested for several months, with excellent reliability and performance, with a COP of 5.5 at design conditions. The compressor can be included in a closed circuit with heat exchangers, or used for direct vapor re-compression. A future commercial range could cover heating capacities in the range 500 to 3500 kW. The technology and results are presented in this paper, together with the perspectives of a future product range.

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Pages: 3-40

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Details

  • Original title: Bomba de calor de alta temperatura usando vapor de agua como refrigerante.
  • Record ID : 30020797
  • Languages: Spanish
  • Source: Frío Calor Aire acondicionado - vol. 44 - n. 494
  • Publication date: 2016/09

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